B 6.2 Effect of humans on environment Flashcards
(10 cards)
Name three ways human activity affects the environment.
Pollution, deforestation, and global warming.
What is pollution?
The introduction of harmful substances into the air, water, or land.
How does deforestation affect biodiversity?
It destroys habitats, leading to a loss of species.
What is global warming?
The gradual increase in Earth’s average temperature due to excess greenhouse gases.
Name two greenhouse gases that contribute to global warming.
Carbon dioxide and methane.
How does burning fossil fuels impact the environment?
It releases carbon dioxide, increasing the greenhouse effect and contributing to climate change.
Give one impact of pollution on aquatic ecosystems.
Toxic chemicals or untreated sewage can kill aquatic life and reduce oxygen levels.
What is biodiversity?
The variety of different species in an ecosystem.
Why is maintaining biodiversity important?
It increases ecosystem stability and supports survival of species, including humans.
Give two conservation methods used to protect biodiversity.
Breeding programs and protecting habitats (e.g., national parks).
